djvu | 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4

General

Target

83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
Size

733KB
MD5

73b4377ba5da0cff19465f5cc5491388
SHA1

9af973b66c4b92019e489500b6f0764045c79f62
SHA256

83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4
SHA512

6e3c5f1b81e3c1095183bfd4208323b4db711920943da4f81c113f52ec2051dc64e492ff6cf77a413f1e005a2b5dddffb2c7053adc4bffe57552649d404f0cb2
SSDEEP

12288:tPA8bo0x6NTfQ5fc39l++XeQho/Z+n5PMkFZ3QaPkiTj:tPifNwk37VroEfZL

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test1/get.php

Attributes

extension
.vepi
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2996-2-0x0000000004A20000-0x0000000004B3B000-memory.dmp	family_djvu
behavioral1/memory/4976-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4976-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4976-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4976-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/4976-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2540-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

872 icacls.exe

pid	process
872	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\cb5e3ddb-40fe-456f-91c0-d50f3bc86cbd\\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe\" --AutoStart"	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

3 api.2ip.ua
4 api.2ip.ua
17 api.2ip.ua

flow	ioc
3	api.2ip.ua
4	api.2ip.ua
17	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

description	pid	process	target process
PID 2996 set thread context of 4976	2996	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 1180 set thread context of 2540	1180	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

pid	process
4976	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
4976	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
2540	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
2540	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
"C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2996
- C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
  "C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4976
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\cb5e3ddb-40fe-456f-91c0-d50f3bc86cbd" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:872
- - C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
    "C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1180
  - - C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
      "C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2540

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
ad097f8a8502cc72518724d2b31426ec

SHA1
4fe49565580149ed2638f29a8cb4f19ef9513a56

SHA256
33a6fcd25004cbccf304f74a38be16f8cd00840ae4b70bca52d2cc68e14cc486

SHA512
2606d0e4798cd79a7a02c49574cc12f0166284923c4f6adb26aeab544a297c4b34fe253452b3fa76c15a1da670f3fe63988fe77e03ff1cd8e8063d37570aefc2

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
410B

MD5
f96e120643299d47bea27181dc06f020

SHA1
a3f17d7043146175f9f4c9b54233b122adc8ee00

SHA256
841ef7f0d041def4aca6d51a38db2d5d8eb344f00520ff299151c16b05455607

SHA512
f8f38940b5fd0c99b181e5f1063c94adff352c9bafac5cd6d1893dd1261611685f491b404be26571ed0d13cf62ee62134651c5a171caf8ea4e81cbb562a13fa6

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
392B

MD5
7a4d0743ff39e68172f5ebd498210b57

SHA1
8a589dca02f4e74d05435cfa592c822e1343470e

SHA256
872d154e358f9e0e27df1208b2ea820976b3dc9163a767d2b923a96f07979d86

SHA512
954e825050d681a564c88086cc2be6f08e70823fa5e79a1b8d8457e3575a366188f2e4ba01fac83af03c3cd53eef8cf2736acddc1f0038b38cdb6d06adfcb09f

Download Submit
C:\Users\Admin\AppData\Local\cb5e3ddb-40fe-456f-91c0-d50f3bc86cbd\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

Filesize
733KB

MD5
73b4377ba5da0cff19465f5cc5491388

SHA1
9af973b66c4b92019e489500b6f0764045c79f62

SHA256
83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4

SHA512
6e3c5f1b81e3c1095183bfd4208323b4db711920943da4f81c113f52ec2051dc64e492ff6cf77a413f1e005a2b5dddffb2c7053adc4bffe57552649d404f0cb2

Download Submit
memory/2540-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-41-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2540-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2996-1-0x0000000004970000-0x0000000004A11000-memory.dmp

Filesize
644KB

Download
memory/2996-2-0x0000000004A20000-0x0000000004B3B000-memory.dmp

Filesize
1.1MB

Download
memory/4976-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4976-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4976-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4976-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4976-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 2996 wrote to memory of 4976	2996	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 2996 wrote to memory of 4976	2996	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 2996 wrote to memory of 4976	2996	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 2996 wrote to memory of 4976	2996	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 2996 wrote to memory of 4976	2996	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 2996 wrote to memory of 4976	2996	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 2996 wrote to memory of 4976	2996	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 2996 wrote to memory of 4976	2996	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 2996 wrote to memory of 4976	2996	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 2996 wrote to memory of 4976	2996	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 4976 wrote to memory of 872	4976	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	icacls.exe
PID 4976 wrote to memory of 872	4976	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	icacls.exe
PID 4976 wrote to memory of 872	4976	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	icacls.exe
PID 4976 wrote to memory of 1180	4976	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 4976 wrote to memory of 1180	4976	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 4976 wrote to memory of 1180	4976	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 1180 wrote to memory of 2540	1180	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 1180 wrote to memory of 2540	1180	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 1180 wrote to memory of 2540	1180	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 1180 wrote to memory of 2540	1180	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 1180 wrote to memory of 2540	1180	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 1180 wrote to memory of 2540	1180	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 1180 wrote to memory of 2540	1180	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 1180 wrote to memory of 2540	1180	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 1180 wrote to memory of 2540	1180	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
PID 1180 wrote to memory of 2540	1180	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe	83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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